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Pleural malignant mesothelioma in which the tumor is locally advanced and technically unresectable. The tumor involves all the ipsilateral pleural surfaces (parietal, mediastinal, diaphragmatic, and visceral pleura) with at least one of the following features: diffuse extension or multifocal masses of tumor in the chest wall, with or without associated rib destruction, direct transdiaphragmatic extension of tumor to the peritoneum, direct extension of tumor to the contralateral pleura, direct extension of tumor to mediastinal organs, direct extension of tumor into the spine, and/or tumor extending through to the internal surface of the pericardium with or without a pericardial effusion; or tumor involving the myocardium. (from AJCC 8th Ed.)
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